Dear Mark Brown, Sorry to bother you. I posted this issue on stackoverflow but didn't get any correct answer yet. So I try to reach you. I'm using Ubuntu 20.04 and the kernel is *5.19.0-rc3+*. When I run *./kselftest_deps.sh gcc* in .*/tools/testing/selftests*, it shows the following: FAIL: alsa/Makefile dependency check: $(shell FAIL: alsa/Makefile dependency check: pkg-config FAIL: alsa/Makefile dependency check: --libs FAIL: alsa/Makefile dependency check: alsa) FAIL: alsa/Makefile dependency check: $(shell FAIL: alsa/Makefile dependency check: pkg-config FAIL: alsa/Makefile dependency check: --libs FAIL: alsa/Makefile dependency check: alsa) In alsa/Makefile, it is: LDLIBS += $(shell pkg-config --libs alsa) ifeq ($(LDLIBS),) LDLIBS += -lasound endif But in ./alsa directory, when I run *$pkg-config --libs alsa, *it returns *-lasound**.* And when I change *$(shell pkg-config --libs alsa)* to *-lasound* in alsa/Makefile, there is no FAIL info for it. So I wonder why the FAIL info appears in the presence of *$(shell pkg-config --libs alsa) *in alsa/Makefile. Is it some sort of bug or did I miss something? Looking forward to your answer. Best Regards. Jessen
